I have the following ServiceStack web service
public class RetreadServices : Service
{
public IRepository Repository { get; set; }
//http://stackoverflow.com/questions/18902135/servicestack-no-server-side-async-support
public async Task<ValidationResponse> Get(RetreadSsnInfoAsync request)
{
return await Task.Factory.StartNew(() =>
{
Tenant.SetTenant(request.TenantId);
return new ValidationResponse { Result = Repository.CannotRetreadSsn(request.Ssn) };
});
}
public async Task<ValidationResponse> Get(RetreadEmailInfoAsync request)
{
return await Task.Factory.StartNew(() =>
{
Tenant.SetTenant(request.TenantId);
return new ValidationResponse { Result = Repository.CannotRetreadEmail(request.Emails) };
});
}
//more methods constructed in the same fashion
}
then in a separate class in my application I have this method (based off of code from @StephenCleary)
private async Task<ValidationResponse[]> DoOperationsConcurrentlyAsync(string tenantId, string[] emails, string ssn)
{
Task<ValidationResponse>[] tasks =
{
ResolveService<RetreadServices>().Get(new RetreadEmailInfoAsync { TenantId = tenantId, Emails = emails }),
ResolveService<RetreadServices>().Get(new RetreadSsnInfoAsync { TenantId = tenantId, Ssn = ssn })
};
await Task.WhenAll(tasks);
ValidationResponse[] result = new ValidationResponse[tasks.Length];
return result;
}
and being invoked like this
synchronous code...
synchronous code...
var result = DoOperationsConcurrentlyAsync(request.TenantId, request.Emails, request.Ssn);
synchronous code...
synchronous code...
The goal of all of this is to wait while the tasks process in parallel and hopefully decrease my over-all time... but the DoOperationsConcurrentlyAsync needs to block, how do I do that? Then as a bonus, how do I pass the return values back from the individual tasks up and out of the method with the async modifier?
I hope I'm understanding this correctly. But don't you just need to add the await
keyword?
synchronous code...
synchronous code...
var result = await DoOperationsConcurrentlyAsync(request.TenantId, request.Emails, request.Ssn);
synchronous code...
synchronous code...
EDIT: Bonus question: Again, I hope I'm understanding you correctly...
But I would replace this:
await Task.WhenAll(tasks);
ValidationResponse[] result = new ValidationResponse[tasks.Length];
return result;
...with simply this:
return await Task.WhenAll(tasks);
That should work the way you want it.
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